نتایج جستجو برای: MOD16

تعداد نتایج: 58  

Journal: :Remote Sensing 2014
Abel Ramoelo Nobuhle Majozi Renaud Mathieu Nebo Jovanovic Alecia Nickless Sebinasi Dzikiti

Globally, water is an important resource required for the survival of human beings. Water is a scarce resource in the semi-arid environments, including South Africa. In South Africa, several studies have quantified evapotranspiration (ET) in different ecosystems at a local scale. Accurate spatially explicit information on ET is rare in the country mainly due to lack of appropriate tools. In rec...

تبخیر- تعرق واقعی از اجزای مهم محاسبات بیلان آب است که امروزه امکان برآورد آن با استفاده از فناوری سنجش از دور فراهم شده است. داده‌های تبخیر- تعرق واقعی MOD16 با استفاده از تصاویر حاصل از سنجندة MODIS تولید می‌شوند و قدرت تفکیک مکانی آنها یک کیلومتر است. در این مطالعه، تبخیر- تعرق واقعی MOD16 با تبخیر- تعرق واقعی برآورد شده توسط مدل SWAP مقایسه شده است. با استفاده از داده‌های اندازه‌گیری‌شده از...

Journal: :Remote Sensing 2016
Hua Zhang Steven M. Gorelick Nicolas Avisse Amaury Tilmant Deepthi Rajsekhar Jim Yoon

The estimation of spatially-variable actual evapotranspiration (AET) is a critical challenge to regional water resources management. We propose a new remote sensing method, the Triangle Algorithm with Variable Edges (TAVE), to generate daily AET estimates based on satellite-derived land surface temperature and the vegetation index NDVI. The TAVE captures heterogeneity in AET across elevation zo...

Journal: :IEEE Trans. Information Theory 1984
Tuvi Etzion Abraham Lempel

The distribution y( c, n) of de Bruijn sequences of order n and linear complexity c is investigated. It is shown that for n > 4, ~(2” 1, n) = 0 (mod@, and for k > 3, ~(2’~ 1,2/c) = 0 (mod16). It is also shown that y(c, n) = 0 (mod4) for all c, and n 3 3 such that cn is even.

Journal: :Remote Sensing 2015
Fei Feng Jiquan Chen Xianglan Li Yunjun Yao Shunlin Liang Meng Liu Nannan Zhang Yang Guo Jian Yu Minmin Sun

Accurate estimation of latent heat flux (LE) is critical in characterizing semiarid ecosystems. Many LE algorithms have been developed during the past few decades. However, the algorithms have not been directly compared, particularly over global semiarid ecosystems. In this paper, we evaluated the performance of five LE models over semiarid ecosystems such as grassland, shrub, and savanna using...

2017
Fei Feng Xianglan Li Yunjun Yao Meng Liu

Estimating cropland latent heat flux (LE) from continental to global scales is vital to modeling crop production and managing water resources. Over the past several decades, numerous LE models were developed, such as the moderate resolution imaging spectroradiometer LE (MOD16) algorithm, revised remote sensing-based Penman-Monteith LE algorithm (RRS), the Priestley-Taylor LE algorithm of the Je...

Journal: :Remote Sensing 2017
Roozbeh Raoufi Edward Beighley

Daily evapotranspiration (ET) is modeled globally for the period 2000–2013 based on the Penman–Monteith equation with radiation and vapor pressures derived using remotely sensed Land Surface Temperature (LST) from the MODerate resolution Imaging Spectroradiometer (MODIS) on the Aqua and Terra satellites. The ET for a given land area is based on four surface conditions: wet/dry and vegetated/non...

Journal: :Remote Sensing 2017
Meredith Reitz Gabriel B. Senay Ward E. Sanford

Evapotranspiration (ET) is a key component of the hydrologic cycle, accounting for ~70% of precipitation in the conterminous U.S. (CONUS), but it has been a challenge to predict accurately across different spatio-temporal scales. The increasing availability of remotely sensed data has led to significant advances in the frequency and spatial resolution of ET estimates, derived from energy balanc...

Journal: :Remote Sensing 2016
Galo Carrillo-Rojas Brenner Silva Mario Córdova Rolando Célleri Jörg Bendix

Understanding of evapotranspiration (ET) processes over Andean mountain environments is crucial, particularly due to the importance of these regions to deliver water-related ecosystem services. In this context, the detection of spatio-temporal changes in ET remains poorly investigated for specific Andean ecosystems, like the páramo. To overcome this lack of knowledge, we implemented the energy-...

Journal: :Journal Of Geophysical Research: Atmospheres 2021

Evapotranspiration (ET) is composed of soil evaporation (ETs), canopy transpiration (ETc), and intercepted water (ETw), it plays an indispensable role in the energy cycles land surface processes. More accurate estimations variations ET are essential for natural hazard monitoring resource management. An improved algorithm ETs with moisture texture (SMT) optimized ETc based on MOD16 model (MOD16-...

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